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authorLinus Torvalds <torvalds@linux-foundation.org>2025-10-03 18:35:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2025-10-03 18:35:22 -0700
commit2ccb4d203fe4bec72fb333ccc2feb71a462c188d (patch)
tree36ee1cf5092d2de98dd304ab00c1483303148b40 /drivers/infiniband/hw/ionic/ionic_queue.c
parente56ebe27a00dee1e083621b67ec23310d8e0319a (diff)
parente6d736bd08902ba53460df1b62ee4218bbd17d9b (diff)
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Pull rdma updates from Jason Gunthorpe: "A new Pensando ionic driver, a new Gen 3 HW support for Intel irdma, and lots of small bnxt_re improvements. - Small bug fixes and improves to hfi1, efa, mlx5, erdma, rdmarvt, siw - Allow userspace access to IB service records through the rdmacm - Optimize dma mapping for erdma - Fix shutdown of the GSI QP in mana - Support relaxed ordering MR and fix a corruption bug with mlx5 DMA Data Direct - Many improvement to bnxt_re: - Debugging features and counters - Improve performance of some commands - Change flow_label reporting in completions - Mirror vnic - RDMA flow support - New RDMA driver for Pensando Ethernet devices: ionic - Gen 3 hardware support for the Intel irdma driver - Fix rdma routing resolution with VRFs" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (85 commits) RDMA/ionic: Fix memory leak of admin q_wr RDMA/siw: Always report immediate post SQ errors RDMA/bnxt_re: improve clarity in ALLOC_PAGE handler RDMA/irdma: Remove unused struct irdma_cq fields RDMA/irdma: Fix positive vs negative error codes in irdma_post_send() RDMA/bnxt_re: Remove non-statistics counters from hw_counters RDMA/bnxt_re: Add debugfs info entry for device and resource information RDMA/bnxt_re: Fix incorrect errno used in function comments RDMA: Use %pe format specifier for error pointers RDMA/ionic: Use ether_addr_copy instead of memcpy RDMA/ionic: Fix build failure on SPARC due to xchg() operand size RDMA/rxe: Fix race in do_task() when draining IB/sa: Fix sa_local_svc_timeout_ms read race IB/ipoib: Ignore L3 master device RDMA/core: Use route entry flag to decide on loopback traffic RDMA/core: Resolve MAC of next-hop device without ARP support RDMA/core: Squash a single user static function RDMA/irdma: Update Kconfig RDMA/irdma: Extend CQE Error and Flush Handling for GEN3 Devices RDMA/irdma: Add Atomic Operations support ...
Diffstat (limited to 'drivers/infiniband/hw/ionic/ionic_queue.c')
-rw-r--r--drivers/infiniband/hw/ionic/ionic_queue.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ionic/ionic_queue.c b/drivers/infiniband/hw/ionic/ionic_queue.c
new file mode 100644
index 000000000000..aa897ed2a412
--- /dev/null
+++ b/drivers/infiniband/hw/ionic/ionic_queue.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2018-2025, Advanced Micro Devices, Inc. */
+
+#include <linux/dma-mapping.h>
+
+#include "ionic_queue.h"
+
+int ionic_queue_init(struct ionic_queue *q, struct device *dma_dev,
+ int depth, size_t stride)
+{
+ if (depth < 0 || depth > 0xffff)
+ return -EINVAL;
+
+ if (stride == 0 || stride > 0x10000)
+ return -EINVAL;
+
+ if (depth == 0)
+ depth = 1;
+
+ q->depth_log2 = order_base_2(depth + 1);
+ q->stride_log2 = order_base_2(stride);
+
+ if (q->depth_log2 + q->stride_log2 < PAGE_SHIFT)
+ q->depth_log2 = PAGE_SHIFT - q->stride_log2;
+
+ if (q->depth_log2 > 16 || q->stride_log2 > 16)
+ return -EINVAL;
+
+ q->size = BIT_ULL(q->depth_log2 + q->stride_log2);
+ q->mask = BIT(q->depth_log2) - 1;
+
+ q->ptr = dma_alloc_coherent(dma_dev, q->size, &q->dma, GFP_KERNEL);
+ if (!q->ptr)
+ return -ENOMEM;
+
+ /* it will always be page aligned, but just to be sure... */
+ if (!PAGE_ALIGNED(q->ptr)) {
+ dma_free_coherent(dma_dev, q->size, q->ptr, q->dma);
+ return -ENOMEM;
+ }
+
+ q->prod = 0;
+ q->cons = 0;
+ q->dbell = 0;
+
+ return 0;
+}
+
+void ionic_queue_destroy(struct ionic_queue *q, struct device *dma_dev)
+{
+ dma_free_coherent(dma_dev, q->size, q->ptr, q->dma);
+}